Stadium: Court 1 Round: 26 Ground: Hardcourt indoor
| ATP - Sofia - Dublu Masculin | 2021/10/03 11:00 | O'Mara/Skupski v Marach/Oswald | 6-3,6-4 |
| ATP - Sofia - Dublu Masculin | 2021/10/02 10:05 | Marach/Oswald v Gonzalez/Molteni | 2-6,7-5,10-6 |
| ATP - Sofia - Dublu Masculin | 2021/09/30 14:55 | Demoliner/Matos v Marach/Oswald | 6-7,6-7 |
| ATP - Sofia - Dublu Masculin | 2021/09/28 11:00 | Bopanna/Qureshi v Marach/Oswald | 2-6,7-6,7-10 |
| ATP - Metz - Dublu Masculin | 2021/09/22 13:20 | Marach/Oswald v Hurkacz/Zielinski | 3-6,4-6 |
| ATP - Metz - Dublu Masculin | 2021/09/21 13:40 | Marach/Oswald v Mahut/Pospisil | 6-4,6-3 |
| US Open - Dublu Masculin | 2021/09/03 15:00 | Marach/Oswald v Erlich/Harris | 2-6,7-6,2-6 |
| ATP - Winston-Salem - Dublu Masculin | 2021/08/26 19:00 | Arevalo/Middelkoop v Marach/Oswald | 6-3,6-3 |